Engine not starting

I have a 1999 Chevy C1500 with a 5.7 and I recently swapped frames(the only thing done to the engine was it being pulled, I did no other work on it), well I hook everything back up(used wiring diagrams to double check) and now its giving off an intermittent spark from the coil. And will not start at all. Any ideas?

Either a bad coil, bad positive connection, or bad ground.
Double check your connections, I suspect the coils good but you either have a loose ground or you might have internally damaged a wire during assembly.